Abstract: A terminal to display a usable manipulation area includes a first body unit, a second body unit, and an operation unit to slide the second body at an incline relative to the first body between a first position where the second body faces the first body, and a second position where the first body is exposed. The front surface of the second body may remain exposed when moving from a first position to the second position.

Abstract: A portable device includes a first body element, a second body element, and a hinge assembly to allow the second body element to slide and rotate, and to vary the vertical arrangement between the first body element and the second body element while remaining parallel to each other. The hinge assembly has a first end rotatably coupled to the first body element and a second end rotatably and slidably coupled to the second body element to allow the first body element and the second body element to slide and vary the vertical arrangement therebetween while staying parallel to each other.